Sprinkler head for emitting square pattern spray



G. E. DEY, SR

April 10, 1962 SPRINKLER HEAD FGR EMITTING SQUARE PATTERN SPRAY FiledMarch 30, 1960 fzgi 2/ /6 INVENTOR. 66 5 D27 5r A7 TOR/Vii tion andclaims.

tlnited States Patent G 3,029,030 SPRINKLER HEAD FOR EMITTING SQUAREPATTERN SPRAY George E. Day, Sn, Lowell, Mich., assignor to G.D.M.Company, Lowell, Mich. Filed Mar. 30', 1960, Ser. No. 18,535 6 Claims.(Cl. 239--520) This invention relates to improvements in sprinkler headfor emitting square pattern spray. The principal objects of thisinvention are:

First, to provide a sprinkler head attachable. to either a fixed ormovable water distribution pipe for emitting a square pattern spray sothat the sprinkler can effectively sprinkle lawns in rectangular areasdefined by walks and drives without wetting the Walks and drives and sothat a series of the sprinkler heads can uniformly cover all of a lawnarea.

Second, to provide a square pattern sprinkler head which is relativelysimple and inexpensive to manufacture and which is easily attached to awater supply pipe.

Third, to provide a square pattern sprinkler head which creates andemits two concentric spray patterns with one pattern covering a circulararea and another pattern covering radially extending triangular areas atrectangularly spaced positions around the circular area to complete arectangular pattern for the spray head as a whole.

Fourth, to provide a novel form of rectangular baffle or splash platewith a compound concavo-convex undersurface which will intersect anddeflect a cylindrical stream of water intoa rectangular spray pattern.

Other objects and advantages of theinvention will be apparent from aconsideration of the following descrip- The drawings, of which there isone sheet, illustrate a highly practical form of the sprinkler head.

FIG. 1 is a small plan view of the sprinkler head illustratingconventionally the square pattern of the spray emitted thereby.

FIG. 2 is a side elevational view of the central baflle plate and itssupporting stem.

FIG. 3 is a side elevational view partially broken away in cross sectionof the bushing and intermediate deflector which receives and cooperateswith the battle plate shown in FIG. 2.

FIG. 4 is a cross sectional view through the supporting ferrule or bodywhich receives and supports the bushing and the bafile plate of FIGS. 2and 3 and by means of which the sprinkler head as a Whole is attached toa supply pipe.

FIG. 5 is a plan view of the body shown in FIG. 4.

FIG. 6 is a fragmentary enlarged elevational view of the baffle plateshown in FIG. 2 as viewed from one corner of the rectangular baffleplate.

FIG. 7 is a fragmentary enlarged cross sectional view through theassembled spray head taken along the plane of the line 7-7 in FIG. 1.

The rectangular bafile plate 1 of the spray head as shown in FIGS. 1, 2and 6 has four merging downwardly concave surfaces 2 which meet at thecorners of the bafile plate. The central area of the underside of thebaffle plate merges with a downwardly projecting and converging conicalbase 3 inclined at 45 from the axis of the base and merging at its lowerend with a tapering stem 5. The lower end of the stem 5 carries a shortcylindrical pin 6 which supports the stem, base and bafile plate as willbe described presently.

The side surfaces of the conical base 3 are cut away alongsemi-cylindrical concave surfaces arranged perpendicularly to thediagonals of the square baffle plate 1. The intersection of thesesemi-cylindrical surfaces 3,629,030 Patented Apr. 10, 1962 ice with theconical surface of the base 3 appear as ellipses at 7 in FIG. 2 and asarcs at the sides of the FIG. 6.

The bushing 8 appearing in FIGS. 3 and 7 has a circular outline with adepending cylindrical neck 9 and an upwardly and outwardly inclinedundersurface 10 on the flange ltla projecting radially outwardly fromthe neck 9. The surface 10 is inclined to the order of 10 from thehorizontal. Interiorly the bushing 8 defines a central bore 11 whichissized somewhat larger than the stem 5 of the baffle plateto freelyreceive the stem and define an annular flow passage 12 therearound as isshown in FIG. 7. An outwardly inclined and upwardly divergent conicalsurface 13 at the upper end of the central bore 11 is opposed to theinclined surface of the base 3 of .the battle plate to provide a narrowthroat 14 with parallel sides inclined at 45 from the horizontal.

The bushing 8 is received in the ferrule or body 15 which is providedwith a central cylindrical bore 16 sized to receive the cylindrical neckf the ferrule as a permanent press fit. Axially inwardly, or downwardly,from the bore 16 as viewed in FIGS. 4 and 7 the bore 15 defines acentral passage 16A. The bore 16 constitutes an upwardly opening passageextending above the lower central passage 16A. A plurality of equalangular spaced vertical grooves 17 formed in the surface of the bore 16afford uniform flow of water from within the body 15 around theneck 9 ofthe ferrule to the inclined surface 10. The upper end of the body 15 iscut away or beveled along the inner edge of the bore 16 as at 18 topermit water emerging through the slots 17 to spread substantiallyuniformly around the inclined surface 10 and be ejected'thereal'ong in agenerally circular pattern as indicated by the dotted lines at 19 inFIGS. 1 and 7.

At its lower end the body or ferrule 15 is'provided with integral.spider arms 20 supporting a central boss 21 with a bore or recess 22therein which receives and supports the pin 6 on the lower end of thestem of bafile plate 1. Engagement of the stem of the baflle plate withthe boss 21 in the body determines the proper axial positioning of thebaffle plate 1 with respect to the surrounding bushing 8. Water entersthe body 15 through the openings between the spider arms 20 for deliveryand diversion into separate streams alongside of the stem 5 of thebaffle plate and through the several grooves 17 in the body to theannular inclined surface 10 on the bushing 8. The exterior of theferrule of body 15 is threaded as at 23 for attachment to any suitableinternal thread in a water supply pipe or conduit.

As appears most clearly from FIGS. 1 and 7 the stream of water deliveredthrough the grooves 17 is deflected into the generally circular pattern19 and discharged at a relatively flat angle as has already beendescribed. The annular stream of water directed through the passage 12between the stem of the bafile plate and the inner bore 11 of thebushing is first deflected and projected outwardly through the inclinedthroat 14 at a substantially higher angle of 45 as indicated by thedotted lines at 24 in FIGS. 1 and 7. Part of these projecting sprayelements 24 deliver to a larger circular area than the inner area 19 bystriking against the downwardly convex under surfaces 2 on .the battleplate. The rest of the spray or stream developed along the conical base3 is deflected outwardly where it travels across the semi-cylindricalsurfaces 7 underneath the corners of the baffle plate 1 therebydeveloping four rectangularly arranged streams or sprays indicated bythe dotted lines 25 which project upwardly and therefore radiallyoutwardly somewhat further than the other radially projecting spraylines to fill in and complete the rectangular overall spray pattern ofthe spray head. It will thus be seen that the three piece head structureis easily assembled and attached to a supply pipe to provide therectangular spray pattern and the other objects set forth at thebeginning of this description.

What is claimed as new is:

l. A spray head comprising a tubular body attachable at its lower end toa supply pipe and having a central passage formed therethrough withaxially extending grooves spaced angularly around the upper end of thepassage, a spider positioned in the lower end of the said passage andsupporting a recessed boss in the center thereof, an annular bushingreceived in retained engagement within the upper end of said passage andterminating above the inner ends of said grooves, an outwardlyprojecting flange on said bushing overlying the upper ends of saidgrooves and inclined upwardly on its underside at a relatively smallangle of approximately the upper end of said body being beveled alongthe upper ends of said grooves, said bushing defining a second passageopening from said first passage in said body and having an upwardly andoutwardly inclined upper surface disposed at a relatively large angle ofapproximately 45 from the horizontal, a rectangular baflle plate havinga depending central conical base with a stern depending furthertherefrom and positioned in spaced relationship from the wall of saidsecond passage, a pin on the lower end of said ste'm received in andsupported by said boss, and downwardly convex surfaces formed along theunderside of said baflle plate along each side of said plate and mergingat the corners of said baflle plate in overhanging relation to saidbushing, the sides of said conical base being cut away along downwardlyconcave semi-cylindrical surfaces disposed about axes perpendicular todiagonals of said rectangular baflle plate and spaced therebelow,

A spray head comprising a tubular body attachable at its lower end to asupply pipe and having a central passage formed therethrough withaxially extending grooves spaced angularly around the upper end of thepassage, a spider positioned in the lower end of the said passage andsupporting a recessed boss in the center thereof, an annular bushingreceived in retained engagement within the upper end of said passage andterminating above the inner ends of said grooves, an outwardlyprojecting flange on said bushing overlying the upper ends of saidgrooves and inclined upwardly on its underside at a relatively smallangle, the upper end of said body being beveled along the upper ends ofsaid grooves, said bushing defining a second passage opening from saidfirst passage in said body and havipg an upwardly and outwardly inclinedupper surface disposed at a relatively large angle from the horizontal,a rectangular baflie plate having a depending central conical base witha stem depending further therefrom and positioned in spaced relationshipfrom the wall of said second passage, a pin on the lower end of saidstem received in and supported by said boss, and downwardly convexsurfaces formed along the underside of said baflle plate along each sideof said plate and merging at the corners of said bafiie plate inoverhanging relation to said bushing, the side of said conical basebeing cut away along downwardly concave semi-cylindrical surfacesdisposed about axes perpendicular to diagonals of said rectangularbafiie plate and spaced therebelow.

3. A spray head comprising a tubular body attachable at its lower end toa supply pipe and having an upwardly opening passage formed therein withaxially extending grooves spaced angularly around the upper end of thepassage, means forming a recess in the lower end of the .said passage,an annular bushing received in retained engagement within the upper endof said passage and terminating above the inner ends of said grooves, anoutwardly projecting flange on said bushing overlying the upper ends ofsaid grooves and inclined upwardly on its underside at :a relativelysmall angle, the upper end of said body being beveled along the upperends of said grooves, said bushing defining a second passage'openingfrom said first central passage in said body and "having an upwardly andout- ;wardly inclined upper surface disposed at a relatively large anglefrom the horizontal, a rectangular baifle plate having a dependingcentral conical base with a stem depending further therefrom andpositioned in spaced relationship from the wall of said second passage,a pin on the lower end of said stem received in and supported by thewalls of said recess, and downwardly facing convexly curved surfacesformed along the underside of said baffle plate alongside of saidconical base and merging at the corners of said baflile plate inoverhanging relation to said bushing, the sides of said conical basebeing cut away along downwardly concave semi-cylindrical surfacesdisposed about axes transverse to diagonals of said rectangular bafiieplate and spaced therebelow.

4. A spray head comprising a tubular body attachable at its lower end toa suply pipe and having an upwardly opening passage therein, meansforming a recess formed in the lower end of the said passage, an annularbushing received in retained engagement within the upper end of saidpassage, said bushing and said body forming axially extending angularlyspaced passages opening to said central passage, an outwardly projectingflange on said bushing overlying the upper ends of said axiallyextending passages and inclined upwardly on its underside at arelatively small angle, said bushing defining a second passage openingfrom said first passage in said body and having an upwardly andoutwardly inclined upper surface disposed at a relatively large anglefrom the horizontal, a rectangular baffie plate having a dependingcentral conical base with a stem depending further therefrom andpositioned in spaced relationship from the wall of said second passage,a pin on the lower end of said stem received in and supported by thewalls of said recess, and downwardly facing surfaces formed along theunderside of said bafiie plate alongside of said conical base inoverhanging relation to said bushing, the sides of said conical basebeing cut away along downwardly concave semicylindrical surfacesdisposed about axes transverse to diagonals of said rectangular bafileplate and spaced therebelow.

5. A spray head comprising a tubular body attachable at its lower end toa supply pipe and having an upwardly opening central passage formedtherein, an annular bushing received in retained engagement within theupper end of said passage, said bushing and said body forming angularlyspaced passages from within said central passage to the end of saidbody, an outwardly projecting flange on said bushing overlying the upperends of said angularly spaced passages and inclined upwardly on itsunderside at a relatively small angle, the upper end of said body beingbeveled along the upper ends of said spaced passages, said bushingdefining a second passage opening from said first central passage insaid body and having an upwardly and outwardly inclined upper surfacedisposed at a relatively large angle from the horizontal, a bafile platehaving a depending central conical base with a stem depending furthertherefrom and positioned in spaced relationship from the wall of saidsecond passage and supported in said body, and downwardly facingconvexly curved surfaces formed along the underside of said baffie platealongside of said conical base and merging at a corner of said bafiieplate in overhanging relation to said bushing, the side of said conicalbase being cut away along a downwardly concave semi-cylindrical surfacedisposed about an axis transverse to a diagonal of said bafile plateextended to said corner and spaced therebelow.

6. A spray head comprising a tubular body attachable at its lower end toa supply pipe and having an upwardly opening central passage formedtherein, an annular bushing received in retained engagement within theupper end of said passage, said bushing and said body forming angularlyspaced passages from within said central passage to the end of saidbody, an outwardly projecting flange on said bushing overlying the upperends of said angularly spaced passages and inclined upwardly on itsunderside at a relatively small angle, said bushing defining a secondpassage opening from said first central passage in said body, a baffleplate having a depending central conical base with a stern dependingfurther therefrom and positioned in spaced relationship from the Wall ofsaid second passage and supported in said body, and downwardly facingconvexly curved surfaces formed along the underside of said baflle platealongside of said conical base and merging at a corner of said bafileplate in overhanging relation to said bushing, the side of said conicalbase being cut away along a downwardly concave semi-cylindrical surfacedisposed about an axis transverse to a diagonal of said bafile plateextended to said corner and spaced therebelow.

References Cited in the file of this patent UNITED STATES PATENTS

